<template>
  <view>
    <!-- 使用自定义组将 -->
    <!-- <my-search :bgcolor="'lightblue'" :radius="12"></my-search> -->
    <my-search @myclick="gotosearch"></my-search>
    <view class="scroll-view-container">
      <!-- 左侧的滑动区 -->
      <scroll-view scroll-y="true" class="left-scroll-view" :style="{height: wh + 'px'}">
        <block v-for="(item,i) in cateList" :key="i">
          <view :class="['left-scroll-view-item', i === active ? 'active' : '']" @click="activeChanged(i)">
            {{item.cat_name}}
          </view>

        </block>
      </scroll-view>
      <!-- 左侧的滑动区 -->
      <scroll-view scroll-y="true" :style="{ height: wh + 'px'}" :scroll-top="scrollTop">
        <!-- 右侧滑动区域 -->
        <view class="cate-lv2" v-for="(item2,i2) in cateLevel2 " :key="i2">
          <!-- 二级分类的标题 -->
          <view class="cate-lv2-title">
            / {{ item2.cat_name}} /
          </view>
          <!-- 当前二级分类的三级分类列表 -->
          <view class="cate-lv3-list">
            <!-- 三级分类的item项 -->
            <view @click="gotoGoodsList(item3)" class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3">
              <!-- 三级分类的图片 -->
              <image :src="item3.cat_icon" mode=""></image>
              <!-- 三级分类的文本 -->
              <text>{{item3.cat_name}}</text>

            </view>

          </view>


        </view>

        <view class="">

        </view>

      </scroll-view>
    </view>

  </view>
</template>

<script>
import badgeMix from '@/mixins/tabbar-badge.js'
export default {
  mixins: [badgeMix],
  data () {
    return {
      //当前设备的可用高度
      wh: 0,
      cateList: [],
      //二级分类的列表
      cateLevel2: [],
      active: 0,
      scrollTop: 0
    };
  },
  onLoad () {
    const sysInfo = uni.getSystemInfoSync();
    console.log(sysInfo);
    this.wh = sysInfo.windowHeight - 50;
    this.getCateList();
  },
  methods: {
    //获取分类列表的数据
    async getCateList () {
      const {
        data: res
      } = await uni.$http.get('/categories');
      console.log(res);
      if (res.meta.status !== 200) return uni.$showMsg();
      this.cateList = res.message;
      // console.log('分类数据', this
      //   .cateList);

      //为二级分类赋值
      this.cateLevel2 = res.message[0].children; //设置默认的数据
    },
    activeChanged (i) {
      this.active = i;
      // 点击一级分类时为二级分类赋值
      this.cateLevel2 = this.cateList[i].children;

      this.scrollTop = this.scrollTop === 0 ? 1 : 0;
    },
    gotoGoodsList (item) {
      uni.navigateTo({
        url: '/subpkg/good_list/good_list?cid=' + item.cat_id
      });
    },
    gotosearch () {
      console.log('123');
      uni.navigateTo({
        url: '/subpkg/search/search'
      });
    }

  }
};
</script>

<style lang="scss">
.scroll-view-container {
  display: flex;

  .left-scroll-view {
    width: 120px;
  }

  .left-scroll-view-item {
    background-color: #f7f7f7;
    line-height: 60px;
    text-align: center;
    font-size: 12px;

    &.active {
      background-color: #fff;
      position: relative;

      &::before {
        content: '';
        display: block;
        width: 3px;
        height: 30px;
        background-color: #FFB6C1;
        position: absolute;
        top: 50%;
        left: 0;
        transform: translateY(-50%);
      }
    }
  }
}

.cate-lv2-title {
  font-size: 12px;
  font-weight: bold;
  text-align: center;
  padding: 15px;
}

.cate-lv3-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;

  .cate-lv3-item {
    width: 33.3%;
    display: flex;
    flex-direction: column;
    justify-content: center;

    align-items: center;

    margin-bottom: 10px;

    image {
      width: 60px;
      height: 60px
    }

    text {
      font-size: 12px
    }
  }

}
</style>
